Compared to other similar products on the market, the scale of the glasses protractor is clear and accurate, and the pointer swings smoothly. It is designed with a hand pinch groove for easy handling and features a compact size. Constructed from plastic material. This product is suitable for use at home, in the household, dorm, office, and similar environments. Please review the product details carefully to ensure the item meets your needs. Note: Due to different production batches, the actual product may have slight variations in design or color, which do not affect functionality. Color: As shown Material: Plastic Package Contents: 1 x Glasses Protractor The package includes only the items listed above; other accessories are not included. Note: Lighting conditions and monitor settings may cause slight differences in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.